Removable bumper for dispatch carriers



N'dv. 29, 1927. 1,650,982

T. H. CUNNINGHAM REMOVABLE BUMPER FOR DISPATCH CARRIERS Filed Feb. 5. 1926 ,T/wWw2m/a 47 6 Mmv 5 narily v with heads or bumpers of felt or the l1ke proved means provided for l atenaed New. 29, 1927.

UhlllED STATES PATENT OFFICE.

THOMAS H.

COMPANY, OF SYRACUSE, NEW YORK,

CUNNINGHAM, F SYRACUSE, NEW YORI L ASSIGN OR TO THE LAMSON A CORPORATION OF MASSACHUSETTS.

REMOVABLE BUMPER FOR DISPATCH CARRIERS."

Application filed February secured to their closed ends. These heads have commonlybeen secured to the tubular shells by bolts, rivets or similar conventional fastening means, and since the bumpers are I subject to continued wear their replacement has been an item of importance in the up keep of pneumatic dispatch systems. The conventional typesof fastening means when used in this location are inaccessible, and the removal of bumpers from the body portions or their attachment thereto has constituted a troublesome operation.

The present invention relates. to imquickly attaching or detaching the head from the shells. it comprises means projecting from the head through an opening in the endof the tubular shell to be engaged by a locking member adapted to be snapped into locking position.

In using locking means of this type special tools are preferably provided to enable the ready manipulation of the securing elements although in case such tools are not readily available, conventional tools may be used for this purpose.

In the accompanying drawings:

Fig. 1 is a side elevation of a dispatch carrier;

Fig. 2 is a detail elevational view of a re taining plate;

Fig. 3 is a section to larger scale on line of Fig. l;

Fig. l is a view similar to Fig. 3 with the retaining plate removed;

Fig. 5 is a fragmentary section of line 5-5 of Fig. 8; and

Fig. 6 is an end view of the carrier shell.

The preferred form of my invention comprises a carrier having telescoping body portions or shells 1 provided with detach able heads or bumpers 3 upon their closed ends. An elongate resilient locking plate 5 is attached to the inner face of each head 3 by means of rivets 7 passing through suitable openings in the central partv of the plate. The heads of the rivets preferably engage a washer 9 inserted in the depression 10 upon the outer face of the head 3. The, ends of the plate 5,

which is preferably 3, 1926. Serial No. 85,689.

bowed, are bent inwardly to provide pro- Jections 11 forming opposed grooves 12. One of these bent end portions 11 has a continuation or lip let which is bent back to form a substantially reverse curve.

The end 16 of shell 1 is formed as shown in Fig. 6 with two openings 15, which may be substantially rectangular and are arranged in diametric relation to each other. Preferably the end llialso has openings l7 adapted to register with the heads of rivets 7, when the head is brought into normal engage nent with the end of the shell 1. The openings are so shaped and disposed that they are adapted to accommodate the projecting ends 11 of the locking plate 5 (Fig. i i

In order to retain the bumper in engagement with the shell, a retaining plate 19 is provided which is preferably'slightly bowed and which is shown in elevation in Fig. 2.

This plate is substantially rectangular as shown and may benotched as indicated at 21 for engagement with a suitable tool if desired. The retaining plate 19 may be made of either resilient or ductile material, but preferably of material that is slightly resilient, although plate 19 is preferably of somewhat heavier stock than and somewhat stiffer than member 5.

- The members 5 and 19 are so designed that the member 19 may have one end engaged in the groove 12 opposite the lip 14 and may be snapped into locking position with its other end engaged in the opposite groove by pressing its latter end forcibly against lip 14;. To remove the retaining plate and thus unlock it from the shell of the carrier, a tool may be provided which is adapted to spread the ends of the locking plate 5 apart andthus permit the removal of retaining plate 19..

If desired, instead of providing a slightly resilient plate 19 adapted to co-operate with the resilient locking plate 5, the former may be made of ductile material which may be bent into arcuate or bowed form to be engaged with the grooves 11 or member 5 and may then have its mid-portion depressed into locking engagement with part 5 by. the application of force to its central portion tending to render it straight rather than bowed in cross section. Such an operation can readily take place by a light tap upon a rod with its end resting upon mid-portion of plate 19. A retaining plate of this type may be removed by the insertion of a suitable member under its mid-portion to pry it out of engagement with the grooves 11.

I claim:

1. A dispatch carrier comprising a tubular shell with an opening in its end, a detachable head with a projection, the opening in the end of the shell being adapted to ac co-mmodate the projection, and removable means for detachable engagement with the projection to lock the head to the shell.

2. A dispatch carrier comprising a tubular shell with openingsin it'send, a detachable head with projections provided with grooves and adapted to be accommodated in the openings in the end of the shell, and a retaining member adapted to be engaged with the grooves in the resilient projections andtoretain the bumper and shell in locked relation.

v 3. A dispatch carrier having a tubular shell with openings in its end, and a detachable head provided with projecting means adapted to be disposed in the openings in the end and also adapted resiliently to engage means abutting the inner surface of the end of the shell to hold the head upon the shell.

4-. A dispatch carrier having a tubular shell, a detachable head with a bowed resilient plate secured thereto and having its ends projecting therefrom, a pair of spaced openings in the end of the shell to accommodate said projecting ends, and resilient means engaging said-ends to retain the head in position upon-the shell.

5. A dispatch carrier having a tubular shell, a detachable head with a bowed resile ientplate secured thereto, said plate having projecting groovedends, a pair of spaced openings in the end of the shell adapted to receive the grooved ends of the plate, and a resilient retaining plate adapted to I be brought into engagement with the projecting ends and to have its ends received in the grooves whereby detachably to lock the bumper to the shell.

6. A dispatch carrier having a tubular shell, a detachable head with a bowed resil ient plate secured thereto, said plate having its free ends bent to provide opposed grooves, a'pair ofspaced openings in the end of the shell ada'pted'to receive said bent ends, a re tainer adapted to be engaged with the grooves in said ends to hold the head upon the shell, said retainer being adapted to be bowed to release the ends of the plate whereby to permit the removal of the head from the shell.

Signed by me at Syracuse, New York, this first day of February, 1926.

THOMAS H. CUNNINGHAM. 

